Business credit cards allows you to manage your company finances more flexibly and not be so reliant on your debtors to fund any buying that comes around. They allow staff to buy items and services that they need for work without having to meet the cost themselves, through their own money, and then submit an expenses claim.
One advantage to business credit cards is that it can be seen as a mark of trust to your employees, strengthening the work ethic in your company, while at the same time, making it easier for you as an employer to track company spending.
However, as with a personal credit card, it can be tempting to spend more than you probably should on your business credit cards, so it's important to be careful and be aware that some employees may abuse the card. Being careful about who you allow to use the credit facility can stop this from happening.